Ornamental chain



FIG. 1 is a front elevational view of an ornamental chain showing my new design, the opposite side view being identical;

FIG. 2 is a side elevational view, the opposite side view being identical; and,

FIG. 3 is a perspective view.

All the views are limited to a piece of chain. 

The ornamental design for an ornamental chain, as shown and described. 